The key is do you use lots of electricity during summer days when the panel are producing? If so a 5-10% return even with loss of capital is possible. If you do

The key is do you use lots of electricity during summer days when the panel are producing? If so a 5-10% return even with loss of capital is possible. If you don't consume the electricity yourself then it's not really economic. Obviously closer to the equator and higher your electricity prices the better it gets.